Spark Plug: Testing and Inspection

INSPECTION AFTER REMOVAL
Use standard type spark plug for normal conditions.

The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions such as:
- Frequent engine starts.
- Low ambient temperatures.

The cold type spark plug is suitable when spark plug knock occurs with the standard type spark plug under conditions such as:
- Extended highway driving.
- Frequent high engine revolution.







Do not use a wire brush for cleaning the spark plugs. Replace as necessary.

If plug is covered with carbon, a spark cleaner may be used.

Cleaner air pressure:....................less than 588 kPa (6kg/cm2, 85 psi)
Cleaning time..................less than 20 seconds.







Checking and adjusting plug gap is not required between change intervals.


Gap nominal:...........................1.1 mm ( 0.043 inch)